Rhynchonellata - Spiriferida - Ambocoeliidae

Full reference: F.G. Stehli. 1954. Lower Leonardian Brachiopoda of the Sierra Diablo. Bulletin of the American Museum of Natural History 105(3):257-358

Belongs to Attenuatella according to G. A. Cooper and R. E. Grant 1976

Sister taxa: Attenuatella altilis, Attenuatella attenuata, Attenuatella bandoi, Attenuatella bisulcata, Attenuatella incurvata, Attenuatella mengi, Attenuatella mepailensis, Attenuatella multispinosa, Attenuatella omolonensis, Attenuatella paraincurvata, Attenuatella piyasini, Attenuatella stringocephaloides, Attenuatella taimyrica, Attenuatella xiujumqinqiensis

Type specimen: AMNH 27321, a valve (Ventral valve)

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 7.41 x 5.34